/Engine/Source/Editor/PropertyEditor/Public/MaterialList.h
Create a Value Content for Material Item Widget
virtual [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > CreateValueContent ( [IDetailLayoutBuilder](API\Editor\PropertyEditor\IDetailLayoutBuilder) & InDetailBuilder, const [TArray](API\Runtime\Core\Containers\TArray)< [FAssetData](API\Runtime\CoreUObject\AssetRegistry\FAssetData) > & OwnerAssetDataArray, [UActorComponent](API\Runtime\Engine\Components\UActorComponent) * InActorComponent )